Changing Document to Immutable using Automation

[nathan1620_]

Is there a way to change a document property to immutable by using an automation? My ultimate goal is this:

The document is IMMUTABLE when the document is UNLOCKED

and

The document is MUTABLE when the document is LOCKED

Any help would be amazing, Thank you!

[Florent_Guillau]

This is already by default in Nuxeo a security policy (LockSecurityPolicy) which prevents all Writes to a document when it's locked.